// 为旧版babel-runtime提供兼容性导入
import objectAssign from 'core-js/es/object/assign'
import symbol from 'core-js/es/symbol'
import symbolIterator from 'core-js/es/symbol/iterator'

// 导出到全局
window.coreJsShim = {
  objectAssign,
  symbol,
  symbolIterator
} 